According to the US intelligence official, knowledge of the facility is nothing new to the Americans.
“First, we have known about this facility for some time, and it’s full of file cabinets and paper, not aluminum tubes for centrifuges, and second, so far as anyone knows, there is nothing in it that would allow Iran to break out of the JCPOA any faster than it otherwise could,” the official said.
http://www.moonofalabama.org/2018/09/hapless-debunking-of-netanyahus-lies-only-helps-him.html#more